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@article{DAN_1988_302_1_a2, author = {V. I. Elkin}, title = {Classification of affine controllable systems with a phase space of dimension $n<4$}, journal = {Doklady Akademii Nauk}, pages = {18--20}, publisher = {mathdoc}, volume = {302}, number = {1}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1988_302_1_a2/} }
V. I. Elkin. Classification of affine controllable systems with a phase space of dimension $n<4$. Doklady Akademii Nauk, Tome 302 (1988) no. 1, pp. 18-20. http://geodesic.mathdoc.fr/item/DAN_1988_302_1_a2/